<WebSysDescriptionAttribute("Fires when the page is unloaded.")>
Public Event Unload As EventHandler

Dim instance As WebGridCellTemplateContainer
Dim handler As EventHandler
 
AddHandler instance.Unload, handler

[WebSysDescriptionAttribute("Fires when the page is unloaded.")]
public event EventHandler Unload

public event Unload: EventHandler; 

In JScript, you can handle the events defined by another class, but you cannot define your own.

[WebSysDescriptionAttribute("Fires when the page is unloaded.")]
public: __event EventHandler* Unload

[WebSysDescriptionAttribute("Fires when the page is unloaded.")]
public:
event EventHandler^ Unload